Easy Pickled Red Onion Recipe

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Description

Make this easy pickled red onion recipe in just 10 minutes with simple pantry ingredients. Sweet, tangy, and perfect for tacos, burgers, salads, and more.

If you're looking for an easy pickled red onion recipe, you've come to the right place. These bright pink onions are sweet, tangy, crunchy, and incredibly versatile. They take just minutes to prepare and instantly elevate tacos, burgers, sandwiches, salads, grain bowls, and so much more.

Quick pickled onions are popular in many cuisines around the world because they add freshness, acidity, and a satisfying crunch to rich dishes. Unlike traditional fermented pickles, these refrigerator pickles are ready in just a few hours and require no special equipment. Red onions are naturally high in antioxidants, and their vibrant colour becomes even more beautiful after soaking in the pickling brine, making them as eye-catching as they are delicious. 


Key Ingredients & Their Role

  • Red onions – The star ingredient with a naturally sweet flavour and crisp texture.
  • Water – Dilutes the vinegar to create a balanced brine.
  • White sugar – Balances the acidity and softens the sharp onion flavour.
  • Salt – Enhances flavour and helps preserve the onions.
  • White vinegar – Gives the onions their signature tangy taste.
  • Bay leaves – Adds subtle herbal aroma.
  • Whole black peppercorns – Provides gentle warmth and depth.
  • Mustard seeds – Adds a mild earthy flavour and classic pickling character.

Recipe Card

Easy Pickled Red Onion Recipe

Prep Time: 10 minutes

Cook Time: 5 minutes

Cooling Time: 1 hour

Total Time: 1 hour 15 minutes

Cuisine: Western

Estimated Calories: ~35 kcal per serving

Servings: About 12 servings (Makes approximately one 750ml/25 oz jar)

Ingredients

  • 2 medium red onions, thinly sliced into rings
    (about 450g / 1 lb)
  • 300ml water
    (1¼ cups)
  • 150g white sugar
    (¾ cup)
  • ½ teaspoon salt
  • 150ml white vinegar
    (⅔ cup)
  • 3 bay leaves
  • ¼ teaspoon whole black peppercorns
  • ¼ teaspoon mustard seeds

Instructions

1. Prepare the onions

Peel the red onions and slice them into thin rings using a sharp knife or mandoline. Separate the rings gently. 


2. Make the pickling brine

In a medium saucepan, combine:

  • water
  • sugar
  • salt
  • bay leaves
  • whole black peppercorns
  • mustard seeds

Bring the mixture to a gentle boil over medium heat, stirring occasionally until the sugar has completely dissolved. 


3. Add the vinegar

Remove the saucepan from the heat.

Stir in the white vinegar and mix well.

Adding the vinegar after removing the pan from the heat helps preserve its bright, fresh flavour.

4. Prepare your jar

For refrigerator pickles, you don't need to sterilize the jar, but it should be thoroughly washed with hot, soapy water, rinsed well, and completely dry before filling.

Optional: Sterilize the jar

If you'd like extra peace of mind, you can sterilize the jar before using it:

Oven Method

  • Wash the jar and lid with hot soapy water.
  • Place the clean jar (without plastic or rubber parts) into a 120°C (250°F) oven for 15 minutes.
  • Allow it to cool slightly before filling.

Boiling Water Method

Place the jar in boiling water for 10 minutes, then carefully remove it with tongs and allow it to air dry.

5. Fill the jar

Place the sliced onions into the jar.

Carefully pour the warm pickling liquid over the onions until completely submerged.

Add the bay leaves and spices into the jar as well.

Leave about 1 cm (½ inch) of space at the top before sealing. 


6. Cool

Allow the jar to cool at room temperature for about 1 hour.

7. Refrigerate

Seal the jar and refrigerate.

The onions will begin tasting great after about 2 hours, but they're even better after 24 hours.

Store in the refrigerator for up to 2–3 weeks.

Serving Ideas

These pickled red onions are delicious on:

  • Tacos
  • Burritos
  • Nachos
  • Burgers
  • Sandwiches
  • Hot dogs
  • Salads
  • Rice bowls
  • Mexican dishes
  • BBQ meats
  • Pulled pork
  • Grilled chicken
  • Avocado toast

Tips & Substitutions

Tips

  • Slice the onions as thinly as possible for the best texture.
  • Let them sit overnight for the brightest pink colour and best flavour.
  • Always keep the onions submerged in the brine.
  • Use a clean fork or tongs each time you remove onions from the jar.

Substitutions

  • Replace white vinegar with apple cider vinegar for a slightly sweeter flavour.
  • Add sliced jalapeños for a spicy version.
  • Include garlic cloves for extra savoury flavour.
  • Add fresh dill or thyme for an herb-infused variation.
  • Replace some of the sugar with honey or maple syrup for a different sweetness.

FAQ

How long do pickled red onions last?

When stored in a clean jar in the refrigerator, they stay fresh for about 2–3 weeks.

Can I make pickled red onions ahead of time?

Yes! They're actually better after sitting overnight because the onions absorb more flavour.

Do I need to sterilize the jar?

No. For refrigerator pickles, a thoroughly cleaned jar is sufficient. Sterilizing is optional but recommended for the cleanest storage conditions.

Why are my pickled onions bright pink?

Red onions naturally release pigments called anthocyanins when exposed to acidic ingredients like vinegar, creating their beautiful pink colour.

What can I serve with pickled red onions?

They're delicious with tacos, burgers, sandwiches, wraps, salads, grain bowls, BBQ meats, pulled pork, grilled chicken, and many Mexican-inspired dishes.

Wrap-Up

Once you make these easy pickled red onions, you'll want to keep a jar in your fridge at all times. They add the perfect balance of sweet, tangy, and crunchy flavour to almost any meal, and they're incredibly simple to prepare with just a handful of pantry ingredients.

What's your favourite way to use pickled red onions? Let me know in the comments below!

If you enjoyed this recipe, you might also love my SlowCooked Pulled Pork Tacos, where these pickled onions make the perfect fresh and tangy topping. You can find more easy recipes at cookwithjuyea.blogspot.com.

Keyword

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